Community Notice: We'll working on a new release of pythonpy2 that will break backwards compatibility. Check out the thread here if you want to be involved: https://github.com/Russell91/pythonpy/issues/86.

Installation

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pip install pythonpy

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Bonus: tab completion setup is explained at the end of the readme

Usage

Pythonpy will evaluate any python expression from the command line.

Float Arithmetic

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  $ py '3 * 1.5' 
  4.5

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Import any module automatically

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$ py 'math.exp(1)' 2.71828182846

$ py 'random.random()' 0.103173957713

$ py 'datetime.datetime.now?' Help on built-in function now:

now(...) [tz] -> new datetime with tz's local day and time.

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py -x 'foo(x)' will apply foo to each line of input

Multiply each line of input by 7

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  $ py 'range(3)' | py -x 'int(x)*7'
  0
  7
  14

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Grab the second column of a csv
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

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  $ echo $'a1,b1,c1\na2,b2,c2' | py -x 'x.split(",")[1]'
  b1
  b2

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Append ".txt" to every file in the directory

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$ ls | py -x '"mv %s %s.txt" % (x,x)' | sh

sharp quotes are swapped out for single quotes

single quotes handle spaces in filenames

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Remove every file returned by the find command

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  $ find . -type f | py -x '"rm %s" % x' | sh 

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Get only 2 digit numbers
~~~~~~~~~~~~~~~~~~~~~

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  $ py 'range(14)' | py -x 'x if len(x) == 2 else None'
  10
  11
  12
  13

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py -l will set l = list(sys.stdin)
-------------------------------------------

Lists are printed row by row
~~~~~~~~~~~~~~~~~~~~~~~~~~~~

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  $ py 'range(3)'
  0
  1
  2

  $ py '[range(3)]'
  [0, 1, 2]

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Reverse the input
~~~~~~~~~~~~~~~~~

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  $ py 'range(3)' | py -l 'l[::-1]'
  2
  1
  0

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Sum the input
~~~~~~~~~~~~~

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  $ py 'range(3)' | py -l 'sum(int(x) for x in l)'
  3

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Sort a csv by the second column
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

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  $ echo $'a,2\nb,1' | py -l 'sorted(l, key=lambda x: x.split(",")[1])'
  b,1
  a,2

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Count words beginning with each letter
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

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  $ cat /usr/share/dict/words | py -x 'x[0].lower()' | py -l 'collections.Counter(l).most_common(5)'
  ('s', 11327)
  ('c', 9521)
  ('p', 7659)
  ('b', 6068)
  ('m', 5922)

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For more examples, check out the `wiki <http://github.com/Russell91/pythonpy/wiki>`__.

Pythonpy also supports ipython style tab completion, which you can enable by adding the following to your .bashrc

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  $ if command -v find_pycompletion.sh>/dev/null; then source `find_pycompletion.sh`; fi

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The tab completion has a few quirks, all of which are necessary evils. If you find any regressions in behaviour, please report them though.